| District: | 4 |
| Chamber: | Assembly |
| Population: | 474,729 [1] |
| Percent White: | 48.8 |
| Percent Latino: | 33.6 |
| Percent Black: | 2.0 |
| Percent Asian: | 8.9 |
| Percent Native American: | 0.8 |
| Percent Pacific Islander: | 0.3 |
| Percent Other Race: | 0.6 |
| Percent Remainder Of Multiracial: | 5.0 |
| Democratic: | 46.61 |
| Republican: | 23.86 |
| Npp: | 24.07 |
California's 4th State Assembly district is one of 80 California State Assembly districts. It is currently represented by Democrat Cecilia Aguiar-Curry of Winters.
The district encompasses much of the southern and western Sacramento Valley and Wine Country. The Coast Ranges run down the western half of the district.
Colusa County – 100%
Lake County – 100%
Napa County – 100%
Sonoma County – 6.20%
Yolo County – 100%
| Year | Office | Results[2] |
|---|---|---|
| 2021 | Recall | align="right" No 65.1 – 34.9% |
| 2020 | President | Biden 66.3 – 31.2% |
| 2018 | Governor | Newsom 63.9 – 36.1% |
| Senator | Feinstein 51.5 – 48.5% | |
| 2016 | President | Clinton 62.8 – 29.8% |
| Senator | Harris 67.2 – 32.8% | |
| 2014 | Governor | Brown 66.4 – 33.6% |
| 2012 | President | Obama 63.2 – 33.9% |
| Senator | Feinstein 65.7 – 34.3% |
Due to redistricting, the 4th district has been moved around different parts of the state. The current iteration resulted from the 2011 redistricting by the California Citizens Redistricting Commission.
| Assembly members | Party | Years served | Counties represented | Notes | |
|---|---|---|---|---|---|
| John Yule | Republican | January 5, 1885 - January 3, 1887 | |||
| Thaddeus Wilton Huff Shanahan | Democratic | January 3, 1887 - January 2, 1893 | |||
| William P. Mathews | January 2, 1893 - January 7, 1895 | Tehama, Trinity | |||
| Daniel Garrard Reid | January 7, 1895 - January 4, 1897 | ||||
| Frank Houghton | January 4, 1897 - January 2, 1899 | ||||
| W. H. La Bare | Republican | January 2, 1899 - January 5, 1901 | |||
| H. S. Gans | January 5, 1901 - January 5, 1903 | ||||
| George Adolf Grotefend | Democratic | January 5, 1903 - January 2, 1905 | Lassen, Modoc, Shasta | ||
| J. H. Creighton | Republican | January 2, 1905 - January 7, 1907 | |||
| Nathan A. Cornish | January 7, 1907 - January 4, 1909 | ||||
| Arthur M. Dean | January 4, 1909 - January 2, 1911 | ||||
| James Halar Tibbits | January 2, 1911 - January 6, 1913 | ||||
| Albert Franklin Shartel | January 6, 1913 - January 8, 1917 | Plumas, Lassen, Modoc, Sierra | |||
| Arthur Joseph Mathews | January 8, 1917 - January 3, 1921 | ||||
| Franklin J. Powers | January 3, 1921 - January 8, 1923 | ||||
| Arthur Joseph Mathews | January 8, 1923 - January 5, 1925 | ||||
| N. V. Wemple | January 5, 1925 - January 7, 1929 | ||||
| Forrest R. Young | Democratic | January 7, 1929 - January 5, 1931 | |||
| Edwin Albert McDaniel | January 5, 1931 - January 2, 1933 | Colusa, Glenn, Tehama | |||
| John Evangelist Frazier | Republican | January 2, 1933 - January 4, 1937 | Butte Sutter, Yuba County, California | ||
| Seth Millington | Democratic | January 4, 1937 - January 4, 1943 | |||
| Albert M. King | January 4, 1943 - January 6, 1947 | ||||
| Bert Willits Loomis | Republican | January 6, 1947 - January 3, 1949 | |||
| Arthur William Coats Jr. | Democratic | January 3, 1949 - January 5, 1953 | |||
| Don Hobbie | Republican | January 5, 1953 – September 20, 1955 | Died in office from a heart attack.[3] | ||
| Harold Thomas Sedgwick | October 17, 1955 – January 7, 1963 | He was sworn in after the death of his predecessor after winning the special election.[4] | |||
| Harold E. Booth | Democratic | January 7, 1963 - January 4, 1965 | Butte, Colusa, Sutter, Glenn, Yolo | ||
| Ray E. Johnson | Republican | January 4, 1965 – November 30, 1974 | |||
| Butte, Colusa, Sutter, Glenn, Lake, Yolo | |||||
| Edwin L. Z'berg | Democratic | December 2, 1974 – August 26, 1975 | Sacramento, Solano, Yolo | Died in office at his apartment from a heart attack.[5] | |
| Vic Fazio | December 10, 1975 – November 30, 1978 | He was sworn in after the death of his predecessor, after winning the special election.[6] | |||
| Thomas M. Hannigan | December 4, 1978 – November 30, 1992 | Solano, Yolo | |||
| David Knowles | Republican | December 7, 1992 – November 30, 1996 | Alpine, Amador, Calaveras, El Dorado, Mono, Placer | ||
| Rico Oller | December 2, 1996 – November 30, 2000 | ||||
| Tim Leslie | December 4, 2000 – November 30, 2006 | ||||
| Alpine, El Dorado, Placer, Sacramento | |||||
| Ted Gaines | December 4, 2006 – January 6, 2011 | Resigned after winning the Senate special election in the 1st district and eventually succeeded by his wife. | |||
| Beth Gaines | May 12, 2011 – November 30, 2012 | Won the 2011 special election in her husband's district. | |||
| Mariko Yamada | Democratic | December 3, 2012 – November 30, 2014 | Colusa, Lake, Napa, Solano, Sonoma, Yolo | ||
| Bill Dodd | December 1, 2014 – November 30, 2016 | ||||
| Cecilia Aguiar-Curry | December 5, 2016 – December 4 2022 | ||||
| December 5, 2022 – present | Colusa, Lake, Napa, Sonoma, Yolo |